Meh. Sell it to me instead. If no, please post a picture of the cpu board including the battery box and surrounding areas in as high rez as you can.

A bad cpu socket or ram socket or their IC's will cause this. Battery acid damage is by far the most common though.
I am looking for a south park at any rate. Broken is fine
Cheers

Hey my friend. That is not fixed. It needs the socket removed the area sanded and vinegar treatment then water then iso. Then replace the components. There are several traces I can see that are bad. More under socket I bet. It hides in the worst places.
Not hard to fix with the right tools, just time consuming.

And yes I know you. lol We are still on the tiny island. Love the last action hero. A friend talked it out of us for a while but it will come back again.
Looks too good next to T2.
If you ever need help shoot me a pm anytime. Always happy to help.
Cheers